A 9-year-old Bronx boy thrown from his apartment building’s roof has awoken from a coma — and talked to NYPD detectives investigating the neighbor charged with trying to kill him, sources said yesterday.

After briefly regaining consciousness, Freddy Martin allegedly told cops how Casmine Aska, 17, who lives in the apartment above him, showed up at his third-floor home and then dragged him to the roof at 1545 Nelson Ave. in Morris Heights on Feb. 1.